weapons soon. we have more from the u.n. >> reporter: secretary of ste hillary clinton's private meeting with israeli prime minister benjamin netanyahu came after a tense day at the united nations. >> a red line should be drawn right here before iran completes the second stage of nuclear enrichment necessary to make a bomb. >> reporter: netanyahu says iran has already completed the first says of -- stage of that process. they could complete the second phase by next summer. that would put it is months or weeks away from finishing its first nuclear bomb, a goal that must be stopped by a military strike if necessary. >> i feel iran will back down. >> reporter: his appeal for the deadline came a day after iranian president mahmoud ahmadinejad addressed the u.n. he denies that iran is seeking to build nuclear weapons. the threat of a nuclear iran has been one of the main topics at this week's meeting of the general assembly. and all of that attention is apparently paying off. secretary clinton and the other permanent members of the security council discussed the matter thursday. a senior u.s.